2125201864 has 16 divisors (see below), whose sum is σ = 3986657100. Its totient is φ = 1062093312.

The previous prime is 2125201853. The next prime is 2125201879. The reversal of 2125201864 is 4681025212.

It can be written as a sum of positive squares in 2 ways, for example, as 2119865764 + 5336100 = 46042^2 + 2310^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45357 + ... + 79420.

Almost surely, 2^2125201864 is an apocalyptic number.

It is an amenable number.

2125201864 is a deficient number, since it is larger than the sum of its proper divisors (1861455236).

2125201864 is a wasteful number, since it uses less digits than its factorization.

2125201864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126912 (or 126908 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 2125201864 is about 46099.9117569654. The cubic root of 2125201864 is about 1285.6815037803.

The spelling of 2125201864 in words is "two billion, one hundred twenty-five million, two hundred one thousand, eight hundred sixty-four".